Cold rolling when the surface of the steel will be sticky with oil and iron powder containing dross, Galvanized line into the galvanized line and continuous annealing line before the annealing furnace before the first need to wash the surface of the steel tank and the dross, Galvanized line and then through the brush tank scrub. When the strip is scrubbed, the iron powder and the alkali wash solution attached to the surface of the strip are brushed off the strip and into the scrubber. The strip needs to be cooled on the roll surface during cold rolling, Galvanized line and the large amount of iron powder produced during the rolling process flows back to the circulating tank with the coolant. Cleaning liquid and coolant to be recycled to remove the iron powder. At present, China has not been able to use a long time and the use of good professional iron removal equipment, mainly by imports of Germany or Japan's magnetic separator. While the import of equipment, high prices, maintenance costs are high, Galvanized line and spare parts of the preparation cycle is long. I developed a high-performance low-cost counter-current iron powder magnetic separator, Galvanized line the actual use of the magnetic separator iron removal rate of up to 98.7%, more than the German magnetic rod iron powder magnetic separator 94% of the iron removal effect. In addition, according to the need to use, by individually improving the permanent magnet magnetic induction strength to further improve the iron removal rate, Galvanized line this method in line with the magnetic separator to the direction of the development trend of high gradient.

The scrub bath containing the iron powder or the mill coolant enters from the inlet 10 of the magnetic separator and slows down as it passes through the concave curved buffer 12 and the decelerated liquid flows along the bottom of the crank Roller 5, to the outlet 1. When the liquid containing the iron powder flows through the roll 5, Galvanized line the permanent magnet 6 in the roll adsorbs the iron powder in the water onto the roller, and the permanent magnet does not rotate with the roll. The iron powder is rotated in the clockwise direction of the roll and dehydrated through the dewatering cloth 7 to the scraper 4. The scraper scrapes the iron powder and puts the iron powder into the waste collection box 3

The technical parameters of the equipment are as follows: (1) The equipment can adsorb more than 98% iron powder powder with diameter ≥20 μm, and it is suitable for NaOH alkali solution with mass fraction of 4% ~ 6%. (2) The magnetic envelope angle is 230 °, and the field strength is basically the same, Galvanized line and the magnetic field of the outer surface of the 130 ° roller without the magnetic angle is zero. (3) The average magnetic induction of the outer surface of the roller is about 0.487 5 T, and the attenuation rate of magnetic induction is 10%. (4) The thickness of the cylinder wall is 8 mm, the surface roughness is 6.3 μm, the diameter is 1 100 mm, the length is 1 800 mm, and the end cap of the roller is the same as the outer diameter of the roller. (5) processing capacity of 110m3 / h. (6) the working temperature is 80 ℃, the ambient humidity is 35% ~ 85%, the ambient temperature is 0 ~ 60 ℃.

The stronger the magnetic induction intensity of the permanent magnet magnetic separator, Galvanized line the better the adsorption effect, and the increase in the magnetic induction does not affect the other components of the magnetic separator. Therefore, Galvanized line it is possible to achieve better magnetic removal by increasing the magnetic induction effect.

Countercurrent iron powder magnetic separator after 3 years of use without any failure, indicating its stable performance, safe and reliable, Galvanized line low maintenance costs. Galvanized line At present, the number of domestic steel mills, the market demand, which has a wide range of application prospects, considerable economic and social benefits.